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The air quality has worsened in the Chinese capital since Wednesday, triggering renewed discontent among residents.

Without rainfall and wind to dispel pollutants, particulate matter has been accumulating in the air. Most monitoring stations measured PM 10 (particulate matter smaller than 10 micrograms) at higher than 300 micrograms per cubic meter.

In southwestern Beijing's Fangshan district, the Liangxiang station recorded 516 micrograms of PM 10 per cubic meter, the highest reading of the day, according to the Beijing Municipal Environmental Monitoring Center.

More than 150 micrograms is considered hazardous to health.

Beijing has been shrouded by heavy smog off and on this winter, and the ongoing air concerns are wearing on residents, particularly as they prepare to celebrate the Spring Festival holiday next week.

"I almost got choked by the smog when I stepped out of the office building on Wednesday," said Yang Yanli, 24, an accountant. "The smell is so terrible, as though I'm inhaling chunks of coal, that it has spoiled my holiday mood."

"PM 10 intensity has been particularly high these days," said Wang Qiuxia, a researcher at the Green Beagle, a non-governmental organization based in Beijing.

Unlike the smog that hit mostly the southern part of the capital on Jan 1, the smog in recent days has shrouded the entire city, according to the Beijing environmental protection bureau.

Worse yet, it will linger until Saturday, when the wind will pick up and disperse it, the bureau predicted.

The Chinese Center for Disease Control and Prevention suggests people stay at home to protect themselves from respiratory and heart problems triggered by heavy smog.

"The intensity of indoor pollutants is 30 to 60 percent lower than those outdoors during a hazy day," said Xu Dongqun, an officer at the environmental bureau. "I suggest people with respiratory problems put off traveling if the smog lingers."

But many people said they had to brave the foul air to travel, especially migrants who are eager to reunite with their families during Spring Festival.

Questions

1 What was the PM 10 measure in Beijing this week?

2 Where was the highest measure taken?

3 How long is it supposed to linger?

Answers

1. Most monitoring stations measured PM 10 (particulate matter smaller than 10 micrograms) at higher than 300 micrograms per cubic meter.

2. Southwestern Beijing's Fangshan district, recording 516 micrograms of PM 10 per cubic meter

3. Until Saturday, when the wind will pick up and disperse it

（中國日報網英語點津 Julie 編輯）

About the broadcaster:

Nelly Min is an editor at China Daily with more than 10 years of experience as a newspaper editor and photographer. She has worked at major newspapers in the US, including the Los Angeles Times and the Detroit Free Press. She is also fluent in Korean.